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Old 05-11-2012, 02:03 PM   #1
Unreal


 
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Custom Tune

2010 SS Camaro with airaid intake and kooks headers.

Desensitized the IAT timing table, desensitized the ECT timing table. Highlighted the entire high octane table and added +2 timing. Disabled torque management, raised the idle to 600 and speedlimitedto 165. Anything else that should be done? Car is showing 4-5 degrees of KR just cruising around at part throttle.
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Old 05-11-2012, 02:31 PM   #2
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cooling fans on at lower temp? disable skip shift if LS3
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Old 05-11-2012, 03:52 PM   #3
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Tuning is more complex than that.

For custom tuning, You have to use a wideband or your guessing at the targeted corrections.


In a stock configuration, your already getting about 6 degrees of knock at WOT and 3 in some areas of part throttle.

From the factory, GM loads it up on fuel for a rich mixture and because of that in some areas it can tolerate more main spark. You may end up reducing spark in some areas of WOT instead of adding, but having a better AFR and no knock to make more power.

For my custom tune im plugged into the car with a wideband, and I reconfigure the mapping to default the vehicle to run in open loop and closed loop during my tuning process. My tuning process takes about 3-4 hours.

I run the car at in a steady state at 1500, 2000, 2500, 3000, 3500, 4000 RPMS, and then let the RPMs drop naturally to 1500 RPMs. I’ll make changes and do it again and again and again until im happy with the fueling on the trims and spark for cruising. For the vehicles with virtual VE tables, the process is slightly differant, or you can rescale the range where the VE table is used and dial in the MAF more and or use additional software to scale them.

Ill neutralize the LTFT for WOT so they don’t interfere with my target AFR, and make my WOT runs to optimism my targeted fuel range with spark. After im happy with that, I turn on the LTFTs for fine tuning to see how the vehicle is running at operating tempertures.

I do many more enhancements to the mapping, but you get the basic concepts. If you do a google search on how to tune an LS motor or LS tuning guides, there's a ton of information on the web. Most of it written by guys on the HP Tuners forum.

Save your original tune to a couple of thumb drives so you'll always have it, and go slow.
www.TampaTuning.com

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Old 05-11-2012, 03:56 PM   #4
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Do a bunch of logs before making any changes, then make one change at a time and test.
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Old 05-11-2012, 09:13 PM   #5
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Quote:
Originally Posted by Tampa Tuning View Post
Tuning is more complex than that.

For custom tuning, You have to use a wideband or your guessing at the targeted corrections.


In a stock configuration, your already getting about 6 degrees of knock at WOT and 3 in some areas of part throttle.

From the factory, GM loads it up on fuel for a rich mixture and because of that in some areas it can tolerate more main spark. You may end up reducing spark in some areas of WOT instead of adding, but having a better AFR and no knock to make more power.

For my custom tune im plugged into the car with a wideband, and I reconfigure the mapping to default the vehicle to run in open loop and closed loop during my tuning process. My tuning process takes about 3-4 hours.

I run the car at in a steady state at 1500, 2000, 2500, 3000, 3500, 4000 RPMS, and then let the RPMs drop naturally to 1500 RPMs. I’ll make changes and do it again and again and again until im happy with the fueling on the trims and spark for cruising. For the vehicles with virtual VE tables, the process is slightly differant, or you can rescale the range where the VE table is used and dial in the MAF more and or use additional software to scale them.

Ill neutralize the LTFT for WOT so they don’t interfere with my target AFR, and make my WOT runs to optimism my targeted fuel range with spark. After im happy with that, I turn on the LTFTs for fine tuning to see how the vehicle is running at operating tempertures.

I do many more enhancements to the mapping, but you get the basic concepts. If you do a google search on how to tune an LS motor or LS tuning guides, there's a ton of information on the web. Most of it written by guys on the HP Tuners forum.

Save your original tune to a couple of thumb drives so you'll always have it, and go slow.
www.TampaTuning.com

Phil
This is the right way to do it. You have to do a ton of data logging to get the spark tables alone right. Heck, I put more than 100 hours in perfecting the VVT cam phasing tables to have them give a nice improvement in power and fuel economy. It took lots of steady state testing on the chassis dyno and a lot of road testing.

Tuning involves a lot more than just adding a global amount of timing and calling it good. Try making a lot of power on 87 octane and see how much work it takes. It would blow your mind.
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Old 05-12-2012, 12:02 AM   #6
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I know. Just found it funny that I pulled a "custom tune" from a local car and member of this site. He paid $350 for the timing to be turned up 2 degrees on the whole map, and the torque management and skip shift turned off.
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Old 05-19-2012, 06:58 AM   #7
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Well I like to keep guys informed during the tuning process, so there's no smoke and mirrors because I see a lot of that BS in the tuning business.

Just because your car is running better, doesnt mean it properly tuned. Just because you turn off the AFM, reduce Torque Management, add shift pressure, and remove CAGSs does not mean your car is tuned, but it will run much better that before.

Ethically, I just cant do that to guys.

If its a mail order tuning, I tell you exactly what a mail order tune is. No BS. No hype. Mail mail order tunes are designed to run very good in your car, but not custom tuned for your car, but can be tweaked for your car to make some corrections. though, its a great bang for the buck at $150.00

For me, I define custom tuning as Im plugged into your vehicle with a wideband and defaulting your car to run in closed loop and open loop to providing me to have acturate information on your car to enhance. Then calibrating purely correct inbound data to have perfect the data and uploaded the real time running condition of the vehicle. That's why my custom tunes take 3-4 hours for bolt ons, 4-5 for heads and cam, and the day for FI cars.
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Old 05-28-2012, 11:41 PM   #8
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The Car definately needs a real custom tune. Just doing what you mentioned is not good at all. There are tuners who have been tuning for years who don't have clue what is going on. It boils down to finding someone who knows the fundamentals of tuning. Like everything else, if there is a good foundation then it is likely the tune in the car will be right. Adding and taking away from tables blindly will get you into trouble. I have seen many other shop tunes and all it looks like is bandaids, unfortunately. Patrick and TampaTuning has given some excellent advice.

Shawn
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Old 06-02-2012, 06:36 PM   #9
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Pulled another tune from same place. It is a maggie car so it is just a modified base maggie tune. AFR is 11.7-11.8 and timing is 18-19 degrees with the IAT tables more aggressive. Doesn't seem to safe for a 91 octane daily driver.

Shawn, I know you rock at tuning. Too bad we don't have good shops like you around.
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